Question

Draw a diagram using the congestion control mechanism of TCP Reno and Tahoe. Don’t copy the diagram from lecture slides or the Internet. You have to use your own data for this diagram. The diagram should be very clear and properly labelled.

Answer 1

In TCP Reno and Tahoe both window size increases exponentially till threshold is reached and thereafter increases linearly.

In TCP Reno, when triple duplicate acknowledgement occurs, window size and threshold is dropped to half of current window size. While due to timeout, window size become 1 and threshold becomes half

In Tahoe, window size become 1 and threshold is halfed in case of both triple duplicate acknowledgement and timeout.

Now consider a scenario where initial threshold is 16 and timeout occurs at t=7 and triple duplicate acknowledgement occurs at the=14.

The diagram for TCP Reno would be



In case of TCP Tahoe

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